TM-9-2520-234-35 Technical Manual for M109 Transmission XTG-411-2A Download
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PAR 30-31 DESCRIPTION AND OPERATION OF CHAP 2, SEC IV RIGHT- AND LEFT-OUTPUT DRIVE ASSEMBLIES lubrication regulator valve. The pressure maintained at this point is sufficient to balance the compression of the spring pushing the valve upward. This pressure forces oil through the lubrication passages. Oil flow in excess of lubrication require- ments returns to the sump through an ex- haust port at the right side of the valve bore. 31. HYDRAULIC SYSTEM FUNCTION – FIRST GEAR (fig. 7) Note: Refer to par. 47 and fig. 23 for the torque path through the power train. a. Functions in first gear are the same as those described for neutral in par. 30, above, except that the low-range clutch is engaged and the vehicle is moving. b. When the manual selector valve is moved to first gear position, a port is un- covered which directs main pressure to the low-range clutch Movement of the manual selector valve lever puts a lug on the lever in a position which will allow the shift inhibitor plunger to extend and prevent shifting to neutral or reverse at higher speeds. c. When the vehicle is moving for- ward with the brakes released, the brake air valves (text continues on page 31) Change 2 28.1/(28.2 blank)